How to let the user set the billing address om checkout (2.5.2)


I am setting up my first site with MarketPress and noticed that MP adds some fields in the user profile to save shipping & biling information.

How do I let the user enter both info during checkout? Actually I am only presented with "shipping information" at checkout.

Is there anyway to have a checkbox asking if there is a different billing address and, if checked, let the user enter the data?